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/*
 *
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 *
 * Copyright (c) 2004 World Wide Web Consortium,
 *
 * (Massachusetts Institute of Technology, European Research Consortium for
 * Informatics and Mathematics, Keio University). All Rights Reserved. This
 * work is distributed under the W3C(r) Software License [1] in the hope that
 * it will be useful, but WITHOUT ANY WARRANTY; without even the implied
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 *
 * [1] http://www.w3.org/Consortium/Legal/2002/copyright-software-20021231
 */

package org.w3c.dom;

/**
 * This interface permits a DOM implementer to supply one or more implementations, based upon
 * requested features and versions, as specified in <a href='http://www.w3.org/TR/2004/REC-DOM-Level-3-Core-20040407/core.html#DOMFeatures'>DOM
 * Features</a>. Each implemented <code>DOMImplementationSource</code> object is listed in the
 * binding-specific list of available sources so that its <code>DOMImplementation</code> objects are
 * made available. <p>See also the <a href='http://www.w3.org/TR/2004/REC-DOM-Level-3-Core-20040407'>Document
 * Object Model (DOM) Level 3 Core Specification</a>.
 *
 * @since DOM Level 3
 */
public interface DOMImplementationSource {

  /**
   * A method to request the first DOM implementation that supports the
   * specified features.
   *
   * @param features A string that specifies which features and versions are required. This is a
   * space separated list in which each feature is specified by its name optionally followed by a
   * space and a version number.  This method returns the first item of the list returned by
   * <code>getDOMImplementationList</code>.  As an example, the string <code>"XML 3.0 Traversal
   * +Events 2.0"</code> will request a DOM implementation that supports the module "XML" for its
   * 3.0 version, a module that support of the "Traversal" module for any version, and the module
   * "Events" for its 2.0 version. The module "Events" must be accessible using the method
   * <code>Node.getFeature()</code> and <code>DOMImplementation.getFeature()</code>.
   * @return The first DOM implementation that support the desired features, or <code>null</code> if
   * this source has none.
   */
  public DOMImplementation getDOMImplementation(String features);

  /**
   * A method to request a list of DOM implementations that support the
   * specified features and versions, as specified in .
   *
   * @param features A string that specifies which features and versions are required. This is a
   * space separated list in which each feature is specified by its name optionally followed by a
   * space and a version number. This is something like: "XML 3.0 Traversal +Events 2.0"
   * @return A list of DOM implementations that support the desired features.
   */
  public DOMImplementationList getDOMImplementationList(String features);

}
